Cosmic-Ray Tracks in Astrophysical Ices: Modeling with the Geant4-DNA Monte Carlo Toolkit
| dc.contributor.author | SHINGLEDECKER, Christopher | |
| hal.structure.identifier | Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG] | |
| dc.contributor.author | INCERTI, Sébastien | |
| dc.contributor.author | IVLEV, Alexei | |
| dc.contributor.author | EMFIETZOGLOU, Dimitris | |
| dc.contributor.author | KYRIAKOU, Ioanna | |
| dc.contributor.author | VASYUNIN, Anton | |
| dc.contributor.author | CASELLI, Paola | |
| dc.date.issued | 2020-12-01 | |
| dc.identifier.issn | 0004-637X | |
| dc.description.abstractEn | Cosmic rays are ubiquitous in interstellar environments, and their bombardment of dust-grain ice mantles is a possible driver for the formation of complex, even prebiotic molecules. Yet, critical data that are essential for accurate modeling of this phenomenon, such as the average radii of cosmic-ray tracks in amorphous solid water (ASW) remain unconstrained. It is shown that cosmic ray tracks in ASW can be approximated as a cylindrical volume with an average radius that is mostly independent of the initial particle energy. Interactions between energetic ions and both a low-density amorphous (LDA) and high-density amorphous (HDA) ice target are simulated using the Geant4-DNA Monte Carlo toolkit, which allows for tracking secondary electrons down to subexcitation energies in the material. We find the peak track core radii, r cyl , for LDA and HDA ices to be 9.9 nm and 8.4 nm, respectively-somewhat less than double the value of 5 nm often assumed in astrochemical models. | |
| dc.language.iso | en | |
| dc.publisher | American Astronomical Society | |
| dc.title.en | Cosmic-Ray Tracks in Astrophysical Ices: Modeling with the Geant4-DNA Monte Carlo Toolkit | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.3847/1538-4357/abbb30 | |
| dc.subject.hal | Physique [physics]/Astrophysique [astro-ph] | |
| dc.subject.hal | Physique [physics]/Physique [physics]/Physique Générale [physics.gen-ph] | |
| dc.subject.hal | Informatique [cs] | |
| dc.identifier.arxiv | 2010.07419 | |
| bordeaux.journal | The Astrophysical Journal | |
| bordeaux.page | 189 | |
| bordeaux.volume | 904 | |
| bordeaux.issue | 2 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-03039403 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-03039403v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The%20Astrophysical%20Journal&rft.date=2020-12-01&rft.volume=904&rft.issue=2&rft.spage=189&rft.epage=189&rft.eissn=0004-637X&rft.issn=0004-637X&rft.au=SHINGLEDECKER,%20Christopher&INCERTI,%20S%C3%A9bastien&IVLEV,%20Alexei&EMFIETZOGLOU,%20Dimitris&KYRIAKOU,%20Ioanna&rft.genre=article |
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